Download the disk image from: https://archive.org/download/Uncracked4am The CATALOG of this disk is "encrypted", file names contains a lot of ctrl-H. Use CiderPress and look at the only significant file "((((((CROSSFIRE-(C) 1981" 0A62- 4C 00 40 JMP $4000 ; this must be the starting address Now switch to AppleWin, put a breakpoint at $4000 (BPX 4000), boot and start tracing, after a while we found: 5927- 20 91 4C JSR $4C91 ; this is the copy protection check routine Now with an hex editor search for $20 $91 $4C, found it at offset $7D27, change $20 to $2C - BIT. No Apples II were harmed in the macking of this crack.